public static AFS_Directory_Entry FromStream(FileStream stream)
{
var entry = new AFS_Directory_Entry();
entry.filename = BinaryHelper.ReadString(stream, 32);
entry.year = BinaryHelper.ReadUInt16(stream);
entry.month = BinaryHelper.ReadUInt16(stream);
entry.day = BinaryHelper.ReadUInt16(stream);
entry.hour = BinaryHelper.ReadUInt16(stream);
entry.minute = BinaryHelper.ReadUInt16(stream);
entry.second = BinaryHelper.ReadUInt16(stream);
entry.fileLength = BinaryHelper.ReadUInt32(stream);
return(entry);
}
public static AFS FromStream(FileStream stream)
{
var afs = new AFS();
afs.header = BinaryHelper.ReadString(stream, 4);
afs.numFiles = BinaryHelper.ReadUInt32(stream);
afs.tableOfContents = new AFS_TOC_Entry[afs.numFiles];
for (var i = 0; i < afs.numFiles; ++i)
{
var toc_entry = AFS_TOC_Entry.FromStream(stream);
afs.tableOfContents[i] = toc_entry;
}
afs.filenameDirectoryOffset = BinaryHelper.ReadUInt32(stream);
afs.filenameDirectoryLength = BinaryHelper.ReadUInt32(stream);
afs.files = new AFS_File[afs.numFiles];
for (var i = 0; i < afs.numFiles; ++i)
{
var toc_entry = afs.tableOfContents[i];
var file = AFS_File.FromStream(stream, toc_entry.offset, toc_entry.length);
afs.files[i] = file;
}
afs.directory = new AFS_Directory_Entry[afs.numFiles];
// hmm
var dataBlockStart = afs.tableOfContents[0].offset;
var directoryOffsetStreamStart = dataBlockStart - 8;
stream.Position = directoryOffsetStreamStart;
stream.Position = BinaryHelper.ReadUInt32(stream);
// HMMM
// stream.Position = afs.filenameDirectoryOffset;
for (var i = 0; i < afs.numFiles; ++i)
{
var toc_entry = afs.tableOfContents[i];
var directory_entry = AFS_Directory_Entry.FromStream(stream);
afs.directory[i] = directory_entry;
}
return(afs);
}
public void WriteStream(FileStream stream)
{
BinaryHelper.WriteUInt32(stream, offset);
BinaryHelper.WriteUInt32(stream, length);
}
public void WriteStream(FileStream stream)
{
var padding_size = 2048;
// header
BinaryHelper.WriteString(stream, header, 4);
BinaryHelper.WriteUInt32(stream, numFiles);
// table of contents
for (var i = 0; i < numFiles; ++i)
{
var toc_entry = tableOfContents[i];
toc_entry.WriteStream(stream);
}
// padding (table of contents is 512 KB)
var tableOfContentsSize = padding_size * 256;
BinaryHelper.WriteAFSPadding(stream, stream.Position, tableOfContentsSize);
// directory information is at the very end of the table of contents block, past the padding
stream.Position -= 8;
BinaryHelper.WriteUInt32(stream, filenameDirectoryOffset);
BinaryHelper.WriteUInt32(stream, filenameDirectoryLength);
// data (will need to update ToC entry's from here)
for (var i = 0; i < numFiles; ++i)
{
var toc_entry = tableOfContents[i];
toc_entry.offset = (uint)stream.Position;
var afs_file = files[i];
afs_file.WriteStream(stream);
// padding
BinaryHelper.WriteAFSPadding(stream, stream.Position, padding_size);
}
filenameDirectoryOffset = (uint)stream.Position;
// directory
for (var i = 0; i < numFiles; ++i)
{
var dir_entry = directory[i];
dir_entry.WriteStream(stream);
}
filenameDirectoryLength = (uint)(stream.Position - filenameDirectoryOffset);
// padding
BinaryHelper.WriteAFSPadding(stream, stream.Position, padding_size);
// go back and re-write the table of contents, with the updated information
stream.Position = 8; // header = 4, numfiles = 4
// table of contents
for (var i = 0; i < numFiles; ++i)
{
var toc_entry = tableOfContents[i];
toc_entry.WriteStream(stream);
}
BinaryHelper.WriteUInt32(stream, filenameDirectoryOffset);
BinaryHelper.WriteUInt32(stream, filenameDirectoryLength);
}
